Chapter 12
The Central Nervous System
465
12
Terminus of
medulla
oblongata
of brain
Cranial
dura mater
Sectioned
pedicles of
cervical
vertebrae
Spinal nerve
rootlets
Dorsal
median sulcus
of spinal cord
First lumbar
vertebral arch
(cut across)
Spinous
process of
second lumbar
vertebra
Spinal cord
Denticulate
ligament
Arachnoid
mater
Spinal cord
Vertebral
arch
Cauda
equina
Conus
medullaris
Filum
terminale
Denticulate
ligament
Dorsal root
Spinal dura
mater
Dorsal
median
sulcus
(b) Cervical spinal cord.
(d) Inferior end of spinal cord, showing
conus medullaris, cauda equina, and
filum terminale.
(c) Thoracic spinal cord, showing
denticulate ligaments.
Cervical
spinal nerves
Cervical
enlargement
Lumbar
spinal nerves
Sacral
spinal nerves
Thoracic
spinal nerves
Dura and
arachnoid
mater
Lumbar
enlargement
Conus
medullaris
Cauda
equina
Filum
terminale
(a) The spinal cord and its nerve roots, with the bony
vertebral arches removed. The dura mater and
arachnoid mater are cut open and reflected laterally.
Figure 12.26
Gross structure of the spinal cord, dorsal view.
(For related images, see
A Brief Atlas of the Human Body
,
Figures 52, 53, and 55.)
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